TWISTING BALL DISPLAYS COMPRISED OF THIXOTROPIC LIQUID AND BICHROMAL BALLS CHARGED WITH ELECTRET DIPOLES

摘要

This invention generally relates to the use of dipole charged balls having differently coloured hemispheres (bichromal balls) in twisting ball displays comprising a pair of planar addressing electrodes and the space between these electrodes that is filled with a thixotropic liquid into which has been dispersed a plurality of electrically charged and optically anisotropic rotatable elements.